San Francisco, California has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 51.4 °F (low) to 65 °F (high). Annual precipitation averages 23.3 Inches. San Francisco is located in USDA Plant Hardiness Zone 10b.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 45.6 °F | 57.5 °F | 3.89 in. |
| February | 47.3 °F | 60.1 °F | 4.56 in. |
| March | 48.4 °F | 62.2 °F | 3.25 in. |
| April | 49.6 °F | 63.9 °F | 1.2 in. |
| May | 52.1 °F | 65.5 °F | 0.7 in. |
| June | 54.0 °F | 68.1 °F | 0.2 in. |
| July | 55.5 °F | 68.4 °F | 0.03 in. |
| August | 56.6 °F | 69.6 °F | 0.05 in. |
| September | 56.5 °F | 72.1 °F | 0.08 in. |
| October | 54.7 °F | 71.1 °F | 0.79 in. |
| November | 50.1 °F | 63.7 °F | 2.64 in. |
| December | 45.9 °F | 57.8 °F | 5.95 in. |
| Annual | 51.4 °F | 65 °F | 23.34 in. |
| Average First Frost Date | No Frost |
| Average Last Frost Date | |
| Average Days With Frost | Frost Free |
| Plant Hardiness Zone | Zone 10b : 35°F to 30°F |
| Plant Hardiness Zone - 2012 | Zone 10b : 35°F to 30°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |